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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d67d3189eaa1bde5d4212d03a1fb7c68da113d4bdfaddcbb7492bc1bb042f4a' 
  AND token = '6pOuXMOLwjO5aJBBdw6bSgOkkMmDDEaVJBB3wQtl+YA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}